. US Consumer Inflation to 12-Month High in August

US Consumer Inflation to 12-Month High in August

US Consumer Inflation to 12-Month High in August

13 Sep 2023

Understanding the Surge in US Consumer Prices: Gasoline’s Impact on Inflation.

In August, U.S. consumer prices experienced a significant uptick primarily attributed to soaring gasoline costs. This sudden surge marked the most substantial increase in over a year. However, while headline inflation made headlines, underlying inflation remained relatively subdued, potentially influencing the Federal Reserve’s decision regarding interest rates.

The August Inflation Spike

The Labor Department’s latest report, released on Wednesday, unveiled that the Consumer Price Index (CPI) surged by 0.6% in August. This figure represents the sharpest increase since June 2022. For the preceding two months, the CPI had risen by a more modest 0.2%. This abrupt jump in prices was primarily fueled by a notable rise in gasoline costs.

Gasoline Prices Soared

According to data from the U.S. Energy Information Administration, gasoline prices experienced a substantial increase during August. At its peak, the price per gallon reached an astonishing $3.984 during the third week of the month. In stark contrast, the price stood at $3.676 per gallon in July. The rapid surge in gasoline prices played a pivotal role in the overall inflationary pressure.

A Year-Over-Year Perspective

Over the past 12 months, the CPI has increased by 3.7%, following a 3.2% rise in July. Despite consecutive monthly increases, it’s worth noting that consumer prices have retreated from their peak of 9.1% in June 2022. This evolution brings them closer to the Federal Reserve’s inflation target of 2%, indicating a gradual normalization.

Expectations vs. Reality

Prior to the release of the CPI report, economists surveyed by Reuters had anticipated a 0.6% increase in August and a 3.6% annual inflation rate. These expectations were published just a week before the Federal Reserve’s interest rate decision. It’s worth noting that August also witnessed a slight easing of labor market conditions.

The Core CPI

Excluding the volatile food and energy components, the CPI rose by 0.3% in August. This marked the second consecutive month with a 0.2% increase in the so-called core CPI. Despite a continued increase in rents, the pace of growth is slowing, with expectations of further deceleration as additional apartment projects enter the market.

The year-over-year increase in the core CPI for August was 4.3%, down from 4.7% in July, representing the slowest growth since September 2021.

Federal Reserve’s Stance

According to the Fed Watch tool from CME Group, financial markets overwhelmingly anticipate that the Federal Reserve will maintain its current policy rate during its meeting. Since March 2022, the U.S. central bank has raised its benchmark overnight interest rate by 525 basis points, bringing it to the current range of 5.25%-5.50%.

However, it’s important to note that services inflation, excluding shelter, remains high. This could leave the door open for a rate increase in November.

Potential Factors Ahead

Some economists argue that inflation risks are skewed upwards due to rising insurance rates, particularly for motor vehicles. Moreover, recent adjustments in the methodology used to measure these expenses by the Bureau of Labor Statistics may result in an uptick in health insurance costs in the CPI report from October onwards.

Additionally, there’s a concern that prolonged strikes in the auto industry could disrupt supply chains and lead to higher car prices.


The surge in U.S. consumer prices in August, driven primarily by escalating gasoline costs, has garnered significant attention. While headline inflation has increased, underlying inflation remains relatively stable. The Federal Reserve faces the delicate task of balancing these factors when considering future interest rate decisions.


1. What caused the sudden increase in U.S. consumer prices in August?

The abrupt increase in U.S. consumer prices in August was primarily driven by a significant spike in gasoline costs.

2. How has the year-over-year inflation rate evolved in recent months?

Over the past 12 months, the Consumer Price Index (CPI) increased by 3.7%, following a 3.2% rise in July. However, it’s important to note that consumer prices have decreased since reaching a peak of 9.1% in June 2022.

3. What are the expectations for future interest rate decisions by the Federal Reserve?

While financial markets anticipate the Federal Reserve to maintain its current policy rate, there is a possibility of a rate increase in November, especially if services inflation remains high.

4. How might adjustments in measuring expenses impact future inflation reports?

Recent adjustments in the methodology for measuring expenses, particularly health insurance costs, may result in increased figures in future Consumer Price Index (CPI) reports.